PSU Fan at 100% when gaming?

[lewis2701]

Hi all, done a lot of googling on this issue but not really found an answer.

I've recently bought a Strix 3080 and ever since i fitted it to my system my PSU fan spins up to 100% when the GPU is under load.
Initally i thought it was the GPU fans but upon further investigation it was coming from the PSU. It's really audiable and quite irritating, can hear
it through my headset.
My PSU is a Corsair CX750M.

Any help would be greatly appreciated.

 

[Meddling-Monk]

Is that the original or new version (2021)?

 

[lewis2701]

Purchased from Overclockers late December 2021.

 

[montymint]

Post the rest of the system spec too, under full load you pay be pushing the psu

Edit: how is the 3080 wired?

 

[lewis2701]

i5 12600k (Not overclocked)
Corsair H100i
Gigabyte Z690 Gaming X
Corsair Vengeance Pro RGB 16GB

 

[Wing-Man]

The CX range is not the best quality i would just assume your loading it up.

12600k @ default will hit 250w
3080 @ default will hit 250w
your using more than 1 cable to power the 3080 and not daisy chaining right?

What case are you using, im got to assume the PSU as an air feed from outside the case?

 

[lewis2701]

I’ve got 2 separate cables feeding the 3 ports on the GPU so one cable I’m using both the ends if that makes sense?

Yeah that was the assumption I came up with. So a decent quality 850W PSU and I should be fine?

 

[Wing-Man]

Yeah that was the assumption I came up with. So a decent quality 850W PSU and I should be fine?

yes but i would also under volt the CPU and PSU because you just should.

in a gaming system setting a CPU limit of about 185w and lower the GPU to around 950mv will make a massive difference but have no onscreen impact